不同孔径的阴离子柱撑金属有机骨架材料分离C_(2)H_(2)/C_(2)H_(4)  

C_(2)H_(2)/C_(2)H_(4)separation of anion-pillared metal-organic frameworks with different pore sizes

作　　者：叶张苗 刘兆壮 王铭浠 王丽 杨江峰 李晋平[1,2] YE Zhangmiao;LIU Zhaozhuang;WANG Mingxi;WANG Li;YANG Jiangfeng;LI Jinping(College of Chemistry and Chemical Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization,Taiyuan 030024,China)

机构地区：[1]太原理工大学化学与化工学院,山西太原030024 [2]气体能源高效清洁利用山西省重点实验室,山西太原030024

出　　处：《石油化工》2025年第4期473-480,共8页Petrochemical Technology

基　　金：山西省青年科学基金项目(202303021212036);国家自然科学青年基金项目(22308238)。

摘　　要：选用具有不同长度的阴离子柱NbOF_(5)^(2-)和SiF_(6)^(2-)合成了两种孔径分别为0.68 nm和0.56 nm的柱撑状金属有机骨架材料CuNbOF_(5)-TPPY及CuSiF_(6)-TPPY(TPPY为5,10,15,20-四(4-吡啶基)卟啉)。利用XRD、TG和N2吸附-脱附等方法对材料的结构进行了表征,通过单组分气体吸附和混合气体穿透实验研究了两种材料对C_(2)H_(2)/C_(2)H_(4)的吸附分离性能。实验结果表明,孔径略小的CuSiF6-TPPY对C_(2)H_(2)/C_(2)H_(4)混合气体具有更好的分离能力,在298 K、1×10^(5)Pa下C_(2)H_(2)/C_(2)H_(4)选择性可达4.41,且该材料经多次吸附-脱附循环测试后仍保持着良好的可重复使用性和再生性。Two anion-pillared metal-organic frameworks CuNbOF_(5)-TPPY and CuSiF_(6)-TPPY(5,10,15,20-tetra(4-pyridyl)-21H,23H-porphine)with different pore sizes(0.68 nm and 0.56 nm)were synthesized by two anion pillars NbOF_(5)^(2-)and SiF_(6)^(2-)with different lengths.The structure of the material was characterized by XRD,TG,and N_(2)adsorption-desorption.The ability of the two materials to adsorb and separate C_(2)H_(2)/C_(2)H_(4)was researched by single-component gas adsorption and mixed-gas breakthrough experiments.The result shows that CuSiF6-TPPY with the smaller pore size has higher separation ability.The C_(2)H_(2)/C_(2)H_(4)selectivity can be up to 4.41 at 298 K and 1×10^(5)Pa.Furthermore,CuSiF6-TPPY maintains excellent repeatability and regenerability after multiple adsorption-desorption cycles.

关 键 词：乙炔 乙烯 阴离子柱撑金属有机骨架材料 吸附分离 

分 类 号：TQ424.3[化学工程]